I try build react-native run-android on windows this bug appear
then i do follow the answer on this github issue try Command chmod 755 android/gradlew on root folder but chmod' is not recognized as an internal or external command,
operable program or batch file. i think this answer for linux . Some body help me . Thanks for reading my question
The error states that you neither have any android device connected nor do you have emulator running. Follow this guide for android setup.
If you already have android setup and running emulator, try restarting it and run following commands:
Try running following commands:
cd android && ./gradlew clean
cd .. && react-native run-android
From your question seems like you are not started your emulator or device connected.
Follow this steps:-
1.Open your CMD/Terminal from your system
write this command cd "YOUR PATH TO ANDROID SDK"
for example, mine looks like::-
cd /Users/trainee02/Library/Android/sdk/platform-tools
and then hit enter.
3.after enter in directory write this command
export PATH="/Users/YOUR SYSTEM USER NAME/Library/Android/sdk/platform-tools":$PATH
above command is for running android from MAC pc.
then last command is
4.adb reverse tcp:8081 tcp:8081
hit enter
or you can check reference that given in official site
Running On Device React Native
You must update Tools sdk revision 23.0.1 on Android Studio
Related
I always used to start my Expo project by typing in the terminal expo start and then i (for iOS simulator). The day after iOS 16 got released, Expo started to behave differently. After running expo start it gave me a warning: This command is being executed with the global Expo CLI. Learn more: https://blog.expo.dev/the-new-expo-cli-f4250d8e3421
To use the local CLI instead (recommended in SDK 46 and higher), run:
› npx expo start and after pressing i it threw the following error:
Error running xcrun simctl help: You may need to run sudo xcode-select -s /Applications/Xcode.app and try again.
XDLError: You may need to run sudo xcode-select -s /Applications/Xcode.app and try again.
Unable to verify Xcode and Simulator installation. After this I killed the terminal and in a new one I decided to follow the command it gave me in the warning (after running expo start). I ran npx expo start and then i and it threw me a new error which was:
Unable to run simctl:
Error: xcrun exited with non-zero code: 72
CommandError: xcrun is not configured correctly. Ensure sudo xcode-select --reset works before running this command again., but this time it didn't gave me a warning before pressing i. I also tried to run the commands shown in the errors and re-run the app, but still the same errors were thrown. I updated my OS, XCode and also deleted and cloned the project again so i could re-install dependencies just in case something was wrong with them.
I have attached the GitHub repo link of one of my projects so you can test it as well. It's not just this project, it's all of the projects I use Expo, even the new ones won't start.
If anyone has any idea how to fix this and why this happens, I would really appreciate it :)
Uninstalled and re-installed Expo globally. Updated the simulator to iOS 16 and opened the simulator before running expo start. It works as it did before.
I have tried most of solutions on the stackoverflow and github issues related to react native but all in vain... for almost 2 weeks.
Environment
react-native-cli: 2.0.1
react-native: 0.56.0
Window 10 Pro
Using android device 5.1(lollilop)
well the app ran successful in expo client but i need to run the native code.
First error: Unable to load script from assets index.android.bundle on windows
so i was able to run command below and the error disappeared on the phone client
react-native run-android && adb reverse tcp:8081 tcp:8081
But this error has persisted on the package server console
Installing APK 'app-debug.apk' on 'BALR_X7 - 5.1' for app:debug
Installed on 1 device.
BUILD SUCCESSFUL
Running C:\Users\goldsoft25\AppData\Local\Android\Sdk;C:\Users\goldsoft25\AppDat a\Local\Android\Sdk\platform-tools/platform-tools/adb -s 7DM7R4KJ99999999 revers e tcp:8081 tcp:8081
Could not run adb reverse: spawnSync C:\Users\goldsoft25\AppData\Local\Android\S dk;C:\Users\goldsoft25\AppData\Local\Android\Sdk\platform-tools/platform-tools/a db ENOENT
Starting the app on 7DM7R4KJ99999999 (C:\Users\goldsoft25\AppData\Local\Android\ Sdk;C:\Users\goldsoft25\AppData\Local\Android\Sdk\platform-tools/platform-tools/ adb -s 7DM7R4KJ99999999 shell am start -n com.awesomeproject/com.awesomeproject. MainActivity)...
2nd error
development server return error response code --> 500 on the android device
Your help is appreciated
I ensure that i downloaded all the needed API android sdk build tools in my case API 28.0.3 and API 28...
then i run the command below.. pay attention to the location of the android sdk tools
goldsoft25#GOLDSOFTX MINGW64 ~/AppData/Local/Android/Sdk/platform-tools
$ adb devices
then later i run the command below in the same command line as below
adb reverse tcp:8081 tcp:8081
Then later i was able to run react-native run-android and it worked perfectly
When I run react-native run-android it builds successfully and there after
Mobile screen shows nothing more than loading from local host : 8081
I have tried adb reverse tcp:8081 tcp:8081
Start by closing the App on your phone and clearing phone memory.
Close metro bundler on your PC.
Then clear npm cache as follows: npm cache clean --force
Then clean up gradle as follows:
Change into android directory in your project folder: cd android
To clean clean gradle simply run: ./gradlew clean
cd .. back into your project's root directory.
Build your app again using whichever method suits you. My preferred method for RN apps without expo on a windows machine is as follows:
npx react-native run-android
Try either of these ways to fix it:
Try to Open Developer menu by press Ctrl + M in emulator and choose the Setting port, then input the value localhost:8081.
Try to connect the other wifi, then run 'adb reverse tcp:8081 tcp:8081'
Try to change the URL on chrome to http://localhost:8081/debugger-ui/
Cheer!
Samsung DeX!
Samsung DeX runs in the background to discover device connections, it uses port 8081. In my case, it interfered with Metro and adb reverse. Exiting the system tray app fixed the entire issue.
For some reason it was a watchman issue. I remember installing watchman a few days before and it was causing the issue. I uninstalled watchman and it worked.
Uninstalling watchman made it work for me.
Following the facebook.io tutorial for using react-native (https://facebook.github.io/react-native/docs/getting-started.html) I am running into a problem where the AVD android emulator I am using to test the app is complaining
Something went wrong. Could not load exp://192.168.200.83:19000.
Note this is being done on a fresh / unedited project generated via create-react-native-app myapp:
# after having started the AVD and creating the react-native app...
➜ myap npm start
> myapp#0.1.0 start /<path to my react native app>/myapp
> react-native-scripts start
3:26:37 PM: Starting packager...
Packager started!
Your app is now running at URL: exp://192.168.200.83:19000
View your app with live reloading:
Android device:
-> Point the Expo app to the QR code above.
(You'll find the QR scanner on the Projects tab of the app.)
iOS device:
-> Press s to email/text the app URL to your phone.
Emulator:
-> Press a to start an Android emulator.
Your phone will need to be on the same local network as this computer.
For links to install the Expo app, please visit https://expo.io.
Logs from serving your app will appear here. Press Ctrl+C at any time to stop.
› Press a to open Android device or emulator.
› Press s to send the app URL to your phone number or email address
› Press q to display QR code.
› Press r to restart packager, or R to restart packager and clear cache.
› Press d to toggle development mode. (current mode: development)
<press a>
At this point a window opens on the AVD (presumably trying to start the react-native app) and displays the error described above.
(Also tried starting the app with npm run android and opening the link from the expo app on the AVD, but still getting same error).
Does anyone know what can be done at this point (totally new to react and mobile development, so I mostly only followed what was in the tutorial)? Any other information that that I should add to this question?
Looking at this a similar github post (https://github.com/react-community/create-react-native-app/issues/595#issuecomment-373539195), it seems to be a problem of using the wrong network (ie. using a LAN URL that the AVD can't access). And using the exp start --tunnel method described in that post did generate a URL that my mobile phone expo app could actually interpret. My steps for getting things working are shown below. (Note I am using Ubuntu 16.04)
Looking at the docs for installing watchman (https://facebook.github.io/watchman/docs/install.html#system-specific-preparation) (which is used by react-native (on linux)). I see that there is a specific thing about increasing inotify limits on linux (though without any specific values given) (for info on inotify, see https://en.wikipedia.org/wiki/Inotify).
So after installing watchman from source (as seems to be the only way to currently get it on linux) ...
$ cd ~
$ git clone https://github.com/facebook/watchman.git
$ cd watchman/
$ git checkout v4.7.0
$ sudo apt-get install -y autoconf automake build-essential python-dev
$ ./autogen.sh
$ ./configure
$ make
$ sudo make install
$ watchman --version
... we increase the inotify limits.
$ echo 999999 | sudo tee -a /proc/sys/fs/inotify/max_user_watches \
&& echo 999999 | sudo tee -a /proc/sys/fs/inotify/max_queued_events \
&& echo 999999 | sudo tee -a /proc/sys/fs/inotify/max_user_instances \
&& watchman shutdown-server
Based on this older SE post (https://askubuntu.com/a/155343/760862) (basically indicating that it does not take up much resources at all), I assume (and hope) that increasing it like this is OK.
(Increasing the inotify limit like this really seemed to help with a bunch of other problems I was having working with react-native projects (eg. javascript freezing when trying to bundle for export to a device, devices complaining that "something went wrong" or being totally unresponsive to my trying to export prohects to them, etc.))
Now, navigate to the project directory and start exp server process with --tunnel option. From the docs (https://docs.expo.io/versions/latest/workflow/exp-cli):
tunnel (default), lan, localhost. Type of host to use. "tunnel" allows you to view your link on other networks
exp start --tunnel
22:21:14 [exp] Your URL is: exp://xm-apt.myexpousername.myapp.exp.direct:80
22:21:14 [exp] Instructions to open this project on a physical device
22:21:14 [exp] Android devices: scan the above QR code.
22:21:14 [exp] iOS devices: run exp send -s <your-phone-number-or-email> in this project directory in another terminal window to send the URL to your device.
22:21:14 [exp] Instructions to open this project on a simulator
22:21:14 [exp] If you already have the simulator installed, run exp ios or exp android in this project directory in another terminal window.
22:21:14 [exp] Logs for your project will appear below. Press Ctrl+C to exit.
If you see a URL like exp://192.168.200.83:19000 instead, you should also see some logging message like
21:30:35 [exp] Switched to a LAN URL because the tunnel appears to be
down. Only devices in the same network can access the app. Restart
with exp start --tunnel to try reconnecting.
just restart with the same command and the URL should be a non-LAN location.
Optional (if you want to use the interface from npm start in the project instead)
Then open another terminal tab and run the npm start command like so
REACT_NATIVE_PACKAGER_HOSTNAME='xm-apt.myexpousername.myapp.exp.direct' npm start -- --reset-cache
where the REACT_NATIVE_PACKAGER_HOSTNAME is set to the exp URL from the previous step (info about this can be found in the README of every react-native app created via create-react-native-app). The URL created here should now be something like
Your app is now running at URL: exp://xm-apt.myexpousername.myapp.exp.direct:19000
Now open yet another tab. And notice that on tab running the exp process, there should be instructions on how to open the project on different devices (the earlier in this answer for example). Use these instructions to open the project for different devices using this tab we just opened (in my case, for an AVD, runnning exp android (you should see some message in the tab running the exp process like 22:28:57 [exp] Finished building JavaScript bundle in 97ms letting you know it is working)).
Totally new to react-anything so if someone sees anything about this setup that is superfluous or weird, please let me know.
Gradle 2.14
If I want to install the application to the connected device I use the next command:
gradlew installDebug
OK.
But also I have 4 emulators (not started). I want by one gradle command to START emulator my_emulator_name and install my application to this emulator. Something like this:
gradlew installDebug my_emulator_name
Is this a possible?
I came here looking for the same thing. I also asked ChatGPT but didn't get a working answer. Gradle tasks can be defined with code so you could make your own, or maybe there is a way to do it with the android gradle tasks. I'm not seeing simple options there..
I know this is not the answer but it will achieve the same result. Assemble an apk and install it with adb -s. For example:
$ adb devices
List of devices attached
real-device device
emulator-5554 device
emulator-5556 device
$ ./gradlew my-app:assembleDebug
$ adb -s emulator-5554 install -r my-app/build/outputs/apk/debug/my-app.apk